Wow, a lot of drama there for one read
It sounds like to me you are on your way to a break up. What stood out to me was:
1. Away time
2. Not seeing each other for a week
3. I got the feeling that she really didn't want to talk to you on the phone (an assumption and may be wrong)
4. She doesn't want to label you.
5. Going club hopping, a lot
You both are 22 which is still young. Many changes take place between 18 and 30. I don't see this relationship enduring those changes. Communication is broke, trust is lost, and insecurities are high.
I hate to be a downer, but to play off a book title...I don't think she's that into you anymore
However, I'm not getting all the information and I'm not there to see expressions and gestures. I wish you the best of luck and if you want her back you can fight for her, but there needs to be a lot of mending.